Thread-waxing device



Feb. 19, 1929.

B. T. LEVEQUE TY-IREAD WAXING DEVICE Original Filed Feb. 2, 1924 2Sheets-Sheet l fiver/177' Patented Feb. 19, 1929.

UNITED STATES PATENT OFFICE.

BERNARD T. LEVEQUE, OF WENHAM, MASSACHUSETTS, ASSIGNOR TO UNITED SHOEMACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEWJERSEY.

Original application filed February 2, 1924, Serial N 0. 690,265.Divided and this application filed October This invention relates tothread waxing de vices and more particularly to wax pots for miningthreads for use in a shoe sewing machine.

An object of this invention is to produce a novel and improved wax potso constructed as to be more accessible, with amore efficientarrangement of the parts, and having an improved and simplified form ofheating attachment adapted to maintain a more delionto and constant heatcontrol.

with these objects in view the invention consists in the devices,combinations and arrangement of parts hereinafter described and claimed.

The several features of the present inven 'tion and the advantagesattained thereby will be readily understood by those skilled in the artfrom the following description taken in connection with the accompanyingdrawings which illustrate the several features of the invention.

1 is a sectional view in side elevation of the wax pot; Fig. 2 is a planview of the wax pot; Fig. 3 is a view in rear elevation at the wax pot;Fig. 4 is asectional view in front elevation of the wax pot; Fig. 5 is adetail view of the heating member in side elevation; and Fig. 6 is adetail plan view of the heating member.

'ihe wax pot, which is the subject matter of this invention, has beenspecifically adapted tor use in connection with the McKay sole shoesewing machine described in detail in the applicants pending applicationSerial No. 690,265. filed February 2. 1924, of which the presentapplication is a division.

The wax pot is electrically heated and thermostatically controlled. Itconsists of a body iortion 14. to contain the wax and atop portionconsisting of two parts 16 and 18. The part 16 of the top portion isrigidly mounted in the machine while the part 18 is pivoted at 20 at oneside of the part 16 so as to swing laterally from beneath the base ofthe horn and give access to the interior of the wax pot. The wax pot isheated by a heating member 22 containing an electric heating unit 24:.The heating member is pivoted at 26 at one side of the bottom of the waxpot and is forced upwardly toward the bottom of the pot by Serial No.63,225.

means of a spring 28. The heat of the wax is controlled by moving theheating member toward and from the bottom of the pot. This movement ofthe heating member is produced by a thermostat consisting of two metalrods 30 and 32. The rod 30 slides vertically in a tube 34 which extendsupwardly fromthe bottom of the wax pot to a point above the level of thewax. At its lower end the rod 30 bears against the heating member 22 andat its upper end is engaged by an adjustment screw in one end of a lever36 pivotally mounted upon an arm projecting inwardly from the upper edgeof the body portion of the pot. The rod 32 extends from the bottom ofthe wax pot and its upper end bears against the other end of the lever36. With this construction as the heat of the wax in the body portion ofthe wax pot increases the rods 30 and lengthen and push the heatingmember 22 away from the wax pot and as the heat of the wax decreases therods shorten and allow the heating member to return towards the wax pot.A web 38 extends upwardly from the bottom of the pot to increase theradiating surface and a web d0 extends downwardly into the body portionof the pot from the part 16 of the top portion to provide a support fora thread guiding roll 42 located near the bottom of the pot. This webalso provides a sup port for a wax thread stripper consisting of agrooved rod 44: and a leaf spring 46 arranged to bear against the rod.

The part 16 ot the top portion of the wax pot is clamped upon the upperend of supporting rods secured to the machine column and the bodyportion of the pot is clamped upon these rods so as to be capable ofbeing moved vertically when desired towards and from the top portion ofthe pot. It will be noted that the parts of the thermostat are mountedin the body portion of the pot while the thread guide and threadstripper are mounted on the top portion of the pot. The thread guide andthread stripper are thus rendered readily accessible when the bodyportion of the pot is lowered on the rods provided for that purpose.

The thread leads from the thread supply through a dry thread tension ofusual construction, down into the body portion of the pot, around thethread guide upwardly through the wax stripper to the needle threadingdevice of the machine.

The nature and object of the invention having been indicated and thepreferred form of the invention having been described, what is claimedas new is:

1. The combination of a wax pot with a heating member movable toward andfrom the pot and thermostatic means for control- King the movement ofthe heating member.

2. The combination with a a pot, of an external heating member, andmeans for moving the heating member towards and from the pot comprisinga thermostat arranged to be aifeeted by the heat of the wax in the yet.

3. The combination with a wax pot, 0 an external heating member, andmeans for moving the heating member towards and from the pot comprisinga metallic member exposed to the heat of the wax in the pot, andarranged to transmit the movements due to its contraction and expansionto the heating, member.

4. The combination with a wax pot, of an external heating member, andmeans for moving the heating member towards and from the pot comprisinga metallic rod exposed to the heat of the wax in the pot and arranged totransmit its movements of expansion and contraction to theheatingmember.

5. The con'ibination with a wax pot, of an external heating member, andmeans tor moving the heating member towards and from the pot comprisinga metallic rod exposed to the heat of the wax in the pot and having oneend in engagement with the heating member, a lever having one endengaging the other end of the rod, and a metallic rod exposed to theheat of the wax in the pot and engaging the other end of the lever.

In testim0n whereof I have signed in name to this specification.

BERNARD T. LEVEQUE.

